What is the Least Common Multiple of 12215 and 12220?

Least common multiple or lowest common denominator (lcd) can be calculated in two way; with the LCM formula calculation of greatest common factor (GCF), or multiplying the prime factors with the highest exponent factor.

Least Common Multiple of 12215 and 12220 with GCF Formula

The formula of LCM is LCM(a,b) = ( a × b) / GCF(a,b).
We need to calculate greatest common factor 12215 and 12220, than apply into the LCM equation.

GCF(12215,12220) = 5
LCM(12215,12220) = ( 12215 × 12220) / 5
LCM(12215,12220) = 149267300 / 5
LCM(12215,12220) = 29853460

Least Common Multiple (LCM) of 12215 and 12220 with Primes

Least common multiple can be found by multiplying the highest exponent prime factors of 12215 and 12220. First we will calculate the prime factors of 12215 and 12220.

Prime Factorization of 12215

Prime Factorization of 12220

Now multiplying the highest exponent prime factors to calculate the LCM of 12215 and 12220.

LCM(12215,12220) = 5¹ × 7¹ × 349¹ × 2² × 13¹ × 47¹
LCM(12215,12220) = 29853460